Children generally make unreliable witnesses
The longer the exposure to the crime/criminal, the better the identification.
Witnesses are generally better at recognizing their own-race faces than other races.
A person that is confident in their identification is more accurate
Witnesses are better at comparing relative height than determining absolute height.
Sunglasses on the suspect
An eyewitness is better able to identify a good looking person (compared with ugly person) because they would look at a good looking person longer.
An eyewitness is better able to identify an ugly person (compared with good looking person) because they would look at a uglylooking person longer.
A suspect with distinct features is more easily identified than an average person.
A suspect with average features is more easily identified than a person with distinct feathers.
Police tell the witness: "It is OK to say, 'I don't know'"
Police talk to witness ASAP.
The police ask open-ended questions.
The police show a simultaneous photo array followed by a simultaneous live line up.
Sequential (one at a time)